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Motion simulator

a simulator and motion technology, applied in the field of motion simulators, can solve the problems of reducing the inherent stiffness of the actuator, increasing the cost of the simulator, and significantly increasing the cost of the linear actuator

Active Publication Date: 2018-08-16
MOOG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new type of manipulator for a mobile platform. The manipulator is made up of a hexapod and a supplementary actuation assembly. The supplementary actuation assembly has two functionally parallel actuators that are connected to the intermediate member and the platform. This enhances the stiffness of the overall manipulator. The hexapod and the supplementary actuation assembly overlap in three-dimensional space, providing a compact arrangement. The supplementary actuation assembly can move the platform in two degrees of freedom. The intermediate member is attached to the hexapod at three fixing points, and the legs of the intermediate member provide a lightweight and compact structure. The hexapod has a plurality of linear actuators, and the supplementary actuation assembly includes at least one linear actuator with less excursion than any of the hexapod's linear actuators. This design is less expensive and stiffer. Overall, the invention results in a more efficient and stiff manipulator for various applications such as simulation and manufacturing.

Problems solved by technology

Although this may achieve the desired result, it substantially increases the cost of the simulator (longer linear actuators are significantly more expensive than short ones), and can sometimes decrease its inherent stiffness.
In some cases, hexapods are simply unsuitable for the required degree of excursion.

Method used

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Embodiment Construction

[0041]Turning to FIG. 1, a motion simulator 100 generally comprises a base 102, an intermediate member 104, and a platform 106. The intermediate member 104 and the base 102 are joined and driven by a hexapod 108 and the platform 106 and the intermediate member 104 are joined by a joint assembly 110 and driven by supplementary actuation assembly 112.

[0042]The base 102 is generally triangular in shape having a first, second and third vertex 114, 116, 118 respectively, as shown in FIG. 2. The base 102 is attached to a solid immoveable surface such as the floor of a workshop by a known method. The base is positioned to globally immovable global axes XG, YG and ZG. Rotation about XG is roll, and rotation about YG is pitch. Rotation about ZG is yaw.

[0043]The intermediate member 104 is shown in more detail in FIGS. 6 and 7. The intermediate member 104 comprises three arms 120, 122, 124 respectively, extending radially from a central region 126. The intermediate member 104 has a notional lo...

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Abstract

A motion simulator is constructed from a base driving an intermediate member via a 6 DOF hexapod, and a platform driven by a 2DOF simulator is provided on the intermediate member to supplement pitch and roll.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. application Ser. No. 14 / 759,663 filed Jul. 8, 2015, which is the U.S. national phase of International Application No. PCT / EP2013 / 067521 filed Aug. 23, 2013, which claims priority of British Application No. 1300552.5 filed Jan. 14, 2013, the entirety of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention is concerned with a motion simulator. More specifically the present invention is concerned with a motion simulator for applications requiring a large excursion in at least one rotational degree of freedom.BACKGROUND OF THE INVENTION[0003]Motion simulators are well known in the art. The Stewart platform (or hexapod) is a well known form of simulator which moves a platform relative to a base. Hexapods have six linear actuators arranged to move the platform in six degrees of freedom (three linear, three rotational) relative to the base depending on which...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G09B9/00G09B9/12G09B9/14G09B9/02
CPCG09B9/14G09B9/02G09B9/00G09B9/12G05B2219/50162
Inventor WARMERDAM, JEAN PAUL
Owner MOOG BV